Permanent magnet speed control technology (first generation) working principle

The first-generation permanent magnet governor is composed of three parts, a cage conductor rotor, a disc-shaped permanent magnet rotor and a regulator. The disc-shaped permanent magnet rotors are in the cage-shaped conductor rotors, separated by air gaps, and rotate independently with their respective rotating shafts; the regulators regulate the air gap between the disc-shaped permanent magnet rotors and the disc-shaped conductors to change the cage shape. The distance between the conductor rotor and the disk-shaped permanent magnet rotor realizes a change in the magnitude of the transmission torque between the cage conductor rotor and the disk-shaped permanent magnet rotor. The cage-shaped conductor rotor is mounted on the input shaft. The disk-shaped permanent magnet rotor is mounted on the output shaft. When the cage conductor rotor rotates, the cage conductor rotor and the disk-shaped permanent magnet rotor generate relative motion. The permanent magnetic field is in the cage conductor rotor. Eddy currents are generated, and the eddy currents in turn generate an induced magnetic field that interacts with the permanent magnetic field to drive the cylindrical permanent magnet rotor in the same direction as the cylindrical conductor rotor. The result is that the torque of the input shaft is transmitted to the output shaft; The size of the moment is related to the size of the air gap. The larger the air gap, the greater the torque and vice versa.

When the permanent magnet rotor moves back and forth in the axial direction under the action of the regulator, the air gap between the disc-shaped permanent magnet rotor and the cage conductor rotor changes. The larger the air gap, the smaller the transmitted torque and the lower the rotational speed; the smaller the air gap, the larger the transmitted torque and the higher the rotational speed.

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